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Finding the Fourth Proportional to 361,390.40, 541,869.60 and 221,249.60

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Solution

The fourth proportional to 361,390.40, 541,869.60 and 221,249.60 is: 331,742.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    361,390.40 : 541,869.60 = 221,249.60 : x
  2. Step 2: Convert to fraction form
    361,390.40/541,869.60 = 221,249.60/x
  3. Step 3: Cross multiply
    361,390.40x = 541,869.60 × 221,249.60
  4. Step 4: Simplify right side
    361,390.40x = 119,888,432,252.16
  5. Step 5: Solve for x
    x = 119,888,432,252.16/361,390.40
  6. Step 6: Final answer
    x = 331,742.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.